Bk-precision 889B - Manual Bedienungsanleitung PDF herunterladen (Seite 28)

HCUR

HPOT

DUT

(b) BLOCK DIAGRAM

DUT

(a) CONNECTION

1m 10m 100m 1 10 1K 10K 100K 1M100 10M

LPOT

LCUR

Figure 4.3

 5-Terminal (5T)

5-Terminal connection is the combination of 3T and 4T (Figure 4.4). It has four coaxial cables. Due to the

advantage of the 3T and 4T, this connection can widely increase the measurement range for 10mΩ to 10MΩ.

(d) WRONG 4T CONNECTION

POT

DUT

(b) BLOCK DIAGRAM

(a) CONNECTION

1m 10m 100m 1 10 1K 10K 100K 1M100 10M

CUR

DUT

POT

CUR

Figure 4.4

 4-Terminal Path (4TP)

4-Terminal Path connection solves the problem that caused by the test lead inductance. 4TP uses four coaxial

cables to isolate the current path and the voltage sense cable (Figure 4.5). The return current will flow through

the coaxial cable as well as the shield. Therefore, the magnetic flux that generated by internal conductor will

cancel out the magnetic flux generated by external conductor (shield). The 4TP connection increases the

measurement range from 1mΩ to 10MΩ.

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Bk-precision 889B - Manual Bedienungsanleitung Seite 28